Research on Impact Mechanism of Hydraulic Rock Drill

2009 ◽  
Vol 16-19 ◽  
pp. 313-317
Author(s):  
Wen Yuan Tian ◽  
Ping Liu ◽  
Guang Qi Cai
Keyword(s):  
Mathematical Model ◽  
Dynamic Simulation ◽  
Impact Mechanism ◽  
Supply Pressure ◽  
Rock Drill ◽  
Hydraulic Impact ◽  
Working Principle ◽  
Working Performance ◽  
The Impact ◽  
Double Chamber

This paper introduces the working principle of the impact mechanism which is belonging to the double-chamber scavenge oil hydraulic rock drill. On the basis of some fundamental hypothesis, a mathematical model of hydraulic impact mechanism is established, then carrying out a dynamic simulation. Focusing on the influence of supply pressure, supply flow and precharge pressure on the working performance of impact mechanism, some research is implemented, and some regularity conclusions are obtained.

Dynamic Simulation of the Impact Mechanism of Hydraulic Rock Drill Based on AMESim

2012 ◽  
Vol 452-453 ◽  
pp. 1296-1300 ◽  
Author(s):  
Zhong Jun Yin ◽  
Yi Xin Hu
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Simulation ◽  
Theoretical Basis ◽  
Impact Mechanism ◽  
Rock Drill ◽  
The Impact ◽  
Piston Chamber ◽  
Dynamics Process

Through analysis of the dynamics process of hydraulic rock drill, this paper builds a model of the impact mechanism of hydraulic rock drill with AMESim software, obtains curves of the displacements of the piston and valve core, and gets the pressure of the piston chamber. The dynamic analysis of the results indicates that the model of the impact mechanism of hydraulic rock drill agrees well with the principle of hydraulic rock drill. As a result, this research provides a new theoretical basis and method for the hydraulic rock drill.

scholarly journals Performance analysis of a four-stroke compressed air engine

2020 ◽  
Vol 24 (1 Part A) ◽  
pp. 113-126
Author(s):  
Fancong Zeng ◽  
Jinli Xu
Keyword(s):  
Mathematical Model ◽  
Experimental System ◽  
Compressed Air ◽  
Work Efficiency ◽  
Supply Pressure ◽  
Numerical Studies ◽  
Optimizing Design ◽  
Working Principle ◽  
Working Performance ◽  
Set Up

The purpose of this paper is to investigate working performance for a four-stroke compressed air engine via numerical studies. A mathematical model is developed to study the influence of several operative parameters on working performance. The mathematical model consists of thermodynamic model, each stroke model and dynamic model. In addition, a working principle and an experimental system of the compressed air engine are set up. The aims are: to introduce the novel four-stroke engine and to quantify the influence of rotational speed, supply pressure and supply temperature on working characteristics. The simulation and analysis show several meaningful results. The compressed air engine has higher cylinder pressure and work efficiency in lower speed stage, and the increase of the supply pressure can effectively improve indicated work and work efficiency. However, supply temperature has little effect on the performance of the compressed air engine. Therefore, the study of this work will provide a certain guidance function for further study on optimizing design of the compressed air engine.

Leakage Simulation of the Impactor of Hydraulic Rock Drill

2013 ◽  
Vol 744 ◽  
pp. 113-117
Author(s):  
Zhong Jun Yin ◽  
Guang Tian Xia ◽  
Tian Han
Keyword(s):  
Mathematical Model ◽  
Simulation Analysis ◽  
Influence Factors ◽  
Dynamics Simulation ◽  
Effective Control ◽  
Impact Mechanism ◽  
Rock Drill ◽  
Leakage Mechanism ◽  
The Impact ◽  
The Mathematical Model

In order to research the leakage mechanism and influence factors of the hydraulic rock drill, the mathematical model of the leakage is established, and combined with the structure and working principle of the hydraulic rock drill, the impact mechanism dynamics simulation model is built by the AMESim software. Through the analysis of the leakage model, the influence of differential pressure, sealing length and clearance on the leakage is got, the simulation analysis results are consistent with the mathematical model conclusions, and the results have important guiding significance on the clearance selection and the effective control of leakage of the impact mechanism.

Design of Synchronous Machine Model Based on PRO/E and Dynamic Simulation

2012 ◽  
Vol 246-247 ◽  
pp. 1220-1225
Author(s):  
You Kun Zhong
Keyword(s):  
Mathematical Model ◽  
Dynamic Simulation ◽  
Three Dimensional ◽  
Transmission System ◽  
Synchronous Machine ◽  
Dimensional Model ◽  
Transmission Performance ◽  
Three Dimensional Model ◽  
Machine Model ◽  
Working Principle

With the increasing of the number of cars, people are also getting higher and higher demands on the performance of the car, and especially pay attention to the improvement and optimization of automobile transmission system. The transmission is a key part of automobile transmission system, and transmission performance and stability depend on the synchronous machine, so in order to make the vehicle transmission system with higher efficiency, it is necessary to study the synchronous machine. On the basis of elaborating synchronous machine working principle, the use of dynamics theory to establish mathematical model of synchronous machine system, and to carry out the simulation of synchronous machine three-dimensional model in PRO/E environment, then the use of virtual prototype technology to optimize the parameters of synchronous machine, thereby improving the performance of synchronous machine.

Computer Simulation of Controlled Hydraulic Impactor System

2011 ◽  
Vol 179-180 ◽  
pp. 122-127 ◽  
Author(s):  
Guo Ping Yang ◽  
Jun Hao Gao ◽  
Bo Chen
Keyword(s):  
Mathematical Model ◽  
Simulation Environment ◽  
Opening Pressure ◽  
Impact Performance ◽  
Model And Simulation ◽  
Working Principle ◽  
Simulation Results ◽  
Working Performance ◽  
New Generation ◽  
Pilot Valve

In view of general impactor whose parameters can’t be adjusted continually in different conditions, a kind of controlled hydraulic impactor is introduced. Its non-linear mathematical model and simulation model are established. In simulation environment, adjusting opening pressure of pilot valve, supply oil volume and charging pressure of accumulator respectively, influences on the working performance are investigated. Simulation results prove that, working principle of controlled hydraulic impactor is available and its impact performance is superior to traditional impactor. This provides theory basis for innovation and production of a new generation impactor.

scholarly journals EFFECTS OF HEAD GAPS AND ROTOR GAP ON FLOW RATE AND HYDRAULIC LEAKAGE OF A NOVEL NON-CONTACT ROTOR BLOWER

2020 ◽  
Vol 57 (6A) ◽  
pp. 125
Author(s):  
Nguyen Hong Thai
Keyword(s):  
Mathematical Model ◽  
Flow Rate ◽  
Leakage Flow ◽  
Ideal Case ◽  
Design Error ◽  
Leakage Flow Rate ◽  
Working Performance ◽  
The Impact ◽  
The Ideal

The Roots blower belongs to the non-contact rotor pump family, therefore, there are always certain clearances between rotors and clearances between the rotor and the stator. These clearances have serious effects on the working performance of blower. Therefore, to determine the design error and the method of machining to achieve the lowest price, required machining technology, flow rate and pressure, the determination of leakage flow rate and pressure through the head gap and rotor gap is very necessary. Thus, in this paper, the authors conduct to build a mathematical model in order to determine the flow rate and pressure of blower in the ideal case in which there is no clearance and the case in which there are clearances. On that basis, the authors aim to evaluate the impact of head gaps and rotor gap on flow rate and pressure leakage. In order to improve the working performance of blower and to choose the machining method that is suitable for the applications of this blower.

scholarly journals EFFECTS OF HEAD GAPS AND ROTOR GAP ON FLOW RATE AND HYDRAULIC LEAKAGE OF A NOVEL NON-CONTACT ROTOR BLOWER

2020 ◽  
Vol 57 (6A) ◽  
pp. 125
Author(s):  
Nguyen Hong Thai
Keyword(s):  
Mathematical Model ◽  
Flow Rate ◽  
Leakage Flow ◽  
Ideal Case ◽  
Design Error ◽  
Leakage Flow Rate ◽  
Working Performance ◽  
The Impact ◽  
The Ideal

The Roots blower belongs to the non-contact rotor pump family, therefore, there are always certain clearances between rotors and clearances between the rotor and the stator. These clearances have serious effects on the working performance of blower. Therefore, to determine the design error and the method of machining to achieve the lowest price, required machining technology, flow rate and pressure, the determination of leakage flow rate and pressure through the head gap and rotor gap is very necessary. Thus, in this paper, the authors conduct to build a mathematical model in order to determine the flow rate and pressure of blower in the ideal case in which there is no clearance and the case in which there are clearances. On that basis, the authors aim to evaluate the impact of head gaps and rotor gap on flow rate and pressure leakage. In order to improve the working performance of blower and to choose the machining method that is suitable for the applications of this blower.

The Impact of Light Polarisation on Light Field of Scenes with Multiple Reflections

2020 ◽  
pp. 108-115 ◽  
Author(s):  
Vladimir P. Budak ◽  
Anton V. Grimaylo
Keyword(s):  
Mathematical Model ◽  
Light Field ◽  
Global Illumination ◽  
Multiple Reflections ◽  
Software Environment ◽  
The Monte Carlo Method ◽  
Mueller Matrices ◽  
Volume Integration ◽  
The Impact

The article describes the role of polarisation in calculation of multiple reflections. A mathematical model of multiple reflections based on the Stokes vector for beam description and Mueller matrices for description of surface properties is presented. On the basis of this model, the global illumination equation is generalised for the polarisation case and is resolved into volume integration. This allows us to obtain an expression for the Monte Carlo method local estimates and to use them for evaluation of light distribution in the scene with consideration of polarisation. The obtained mathematical model was implemented in the software environment using the example of a scene with its surfaces having both diffuse and regular components of reflection. The results presented in the article show that the calculation difference may reach 30 % when polarisation is taken into consideration as compared to standard modelling.

Sign in / Sign up

Export Citation Format

Share Document